Chemistry Thermochemistry ETEA 2022
PMDC Verified Question 40 of 81
A system that can exchange or transfer both matter and energy with the surroundings is:
A
Open system
B
Adiabatic system
C
Isolated system
D
Closed system
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Open system
Concept:

Thermodynamic systems are classified based on the permeability of their boundaries to matter and energy (heat/work).

Categories:

  • Open: Exchanges both Energy and Matter.
  • Closed: Exchanges Energy only.
  • Isolated: Exchanges Neither.


Solution:

  • A beaker of boiling water without a lid is a classic example. Heat can enter or leave (energy transfer), and water vapor can escape (matter transfer).


  • By definition, a system permitting both exchanges is an open system.


Why other options are incorrect:

A closed system restricts matter transfer. An isolated system restricts both matter and energy transfer. An adiabatic system strictly prevents heat exchange.

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